Saplings Settings Correction & 2x2 Replant fix

Saplings for the Bald Cypress, Rainbow Eucalyptus, and the Redwood trees
all try to plant in 2x2 patterns. At the spot that they land, and have
had their replant chance reduced accordingly. How this will work out in
real world aplications still needs some testing. The fir tree still
replants in a 1x1 pattern since it is not always a 2x2 tree.